Browning Hi-Power Mark I American 9mm Semi-Automatic Pistol

The Mark I is among the best-known models of the P35 developed over the last 50 years. P35s were first imported into the US in 1954 – the US civilian market P35s had the 'Browning Arms Company' stamp on the left side of the slide (to meet the import requirement for US sales under ATF Section 478.112). These P35s lack the provision of the lanyard ring – the left side pistol grip for a Mark I is fully covered unlike those produced for military and law enforcement use. A wide variety of options and features are available on the P35 models. Recently, Hi-Power pistols have become available in the .40 S&W and .357 SIG loadings. The use of these calibres in guns designed and built for 9×19mm Parabellum has created cases of broken or warped frames. Only Hi-Powers specifically built for these rounds should be used to fire them. The pistols manufactured for these two rounds are easily identified by examining the left side of the slide – a groove is machined into the side of the heavier slide to allow clearance for the slide release. Genuine FN-produced P35s (either FN (Europe/international) or Browning (USA) for the civilian market will have a 245-prefix serial number. Some Hi-Power variants (Type 65, Type 73) incorporate production changes e.g. spur hammers (commonly seen for 1971–present civilian market P35s) and/or 2-piece barrels (1965–present). The 'Type 73' variant (with an elongated barrel bushing) of the Mark I was produced into the late 1980s (to 1987) by FM Argentina when Mark II production commenced in the early-mid-1980s (Belgium). The Browning Hi Power is a single-action, semi-automatic handgun available in the 9mm and .40 S&W calibers. It was based on a design by American firearms inventor John Browning, and completed by Dieudonné Saive at Fabrique Nationale (FN) of Herstal, Belgium. Browning died in 1926, several years before the design was finalized. The Hi-Power is one of the most widely used military pistols in history, having been used by the armed forces of over 50 countries. After 82 years of continuous production, the Hi-Power was discontinued in 2017 by Browning Arms, but it remained in production in some countries, under license. The Hi Power name alludes to the 13-round magazine capacity, almost twice that of contemporary designs such as the Luger or Colt M1911. The pistol is often referred to as an HP (for "Hi-Power" or "High-Power"), GP (for the French term, "Grande Puissance"), BAP (Browning Automatic Pistol), or BHP (Browning High-Power). The terms P-35 and HP-35 are also used, based on the introduction of the pistol in 1935. Several sources indicate that the official name was initially "High Power", while it was manufactured in Belgium by Fabrique Nationale prior to the German occupation in World War II. Production of the weapon then moved to a John Inglis and Company plant in Canada; at some date afterwards, the name was changed to "Hi Power". (Some sources indicate that the name change was not until the 1950s.) Production returned to Belgium after the war, in 1944 or 1945. Nonetheless, the term Hi Power has been the most commonly used in articles over the past decades, regardless of the year of manufacture. Versions of the handgun continued to be made at the FN factory in Belgium under Wehrmacht control, with the designation "9mm Pistole 640(b)". The Browning Hi-Power has undergone continuous refinement by FN since its introduction. The pistols were originally made in two models: an "Ordinary Model" with fixed sights and an "Adjustable Rear Sight Model" with a tangent-type rear sight and a slotted grip for attaching a wooden shoulder stock. The adjustable sights are still available on commercial versions of the Hi-Power, although the shoulder stock mounts were discontinued during World War II. In 1962, the design was modified to replace the internal extractor with an external extractor, improving reliability. Standard Hi-Powers are based on a single-action design. Unlike modern double-action semi-automatic pistols, the Hi-Power's trigger is not connected to the hammer. If a double-action pistol is carried with the hammer down with a round in the chamber and a loaded magazine installed, the shooter may fire the pistol either by simply squeezing the trigger or by pulling the hammer back to the cocked position and then squeezing the trigger. In contrast, a single-action pistol can only be fired with the hammer in the cocked position; this is generally done when a loaded magazine is inserted and the slide cycled by hand. In common with the M1911, the Hi-Power is therefore typically carried with the hammer cocked, a round in the chamber and the safety catch on (a carry mode often called cocked and locked in the United States or "made ready" in the UK, or sometimes called condition one). The Hi-Power, like many other Browning designs, operates on the short-recoil principle, where the barrel and slide initially recoil together until the barrel is unlocked from the slide by a cam arrangement. Unlike Browning's earlier Colt M1911 pistol, the barrel is not moved vertically by a toggling link, but instead by a hardened bar which crosses the frame under the barrel and contacts a slot under the chamber, at the rearmost part of the barrel. The barrel and slide recoil together for a short distance but, as the slot engages the bar, the chamber and the rear of the barrel are drawn downward and stopped. The downward movement of the barrel disengages it from the slide, which continues rearward, extracting the spent case from the chamber and ejecting it while also re-cocking the hammer. After the slide reaches the limit of its travel, the recoil spring brings it forward again, stripping a new round from the magazine and pushing it into the chamber. This also pushes the chamber and barrel forward. The cam slot and bar move the chamber upward and the locking lugs on the barrel re-engage those in the slide.